The internal combustion engine is a type of engine that generates power by burning fuel inside a combustion chamber. This process creates hot gases that expand and push against a piston, converting chemical energy from the fuel into mechanical energy. Common fuels used include gasoline and diesel. These engines are widely used in vehicles, such as cars and trucks, as well as in machinery and equipment. The internal combustion engine operates in cycles, typically using a four-stroke process that includes intake, compression, power, and exhaust strokes to efficiently produce energy.